<ng-container *ngFor="let zid of zones$ | async">
    <ng-container *ngIf="zid | zoneInfo | async as zone">
        <button type="button" class="btn btn-secondary btn-sm mr-3 g-delible" [title]="'删除'" (click)="delete(zone)">
      {{ zone.name }}
    </button>
    </ng-container>
</ng-container>

<button type="button" mat-icon-button (click)="zoneSelectRef.open(selection.selected)">
  <mat-icon>add</mat-icon>
</button>
<m-zone-select-input #zoneSelectRef hidden [hideRoot]="true" [formControl]="zoneSelectControl" [selection]="selection"></m-zone-select-input>